Sachs new sucess was designed around 5mm Sprocket spacing for 7 or 8 speed(up to 1997) 1998 and after it was desined around 4.8mm sprocket spacing for 8 speed. 7 speed shimana has 5mm sprocket spacing which is whynit works for you.,post 1998 sach shifters works with shimano 8 speed cassettes.
Sachs new sucess was designed around 5mm Sprocket spacing for 7 or 8 speed(up to 1997) 1998 and after it was desined around 4.8mm sprocket spacing for 8 speed. 7 speed shimana has 5mm sprocket spacing which is whynit works for you.,post 1998 sach shifters works with shimano 8 speed cassettes.